<?php
 
$all = file_get_contents('./textfile.txt', true);
$success = file_get_contents('./textfile2.txt', true);
 
$result = ("$success"*100/"$all");
if ($result>100){
        $result = 100;
    }
$result = round($result);
 
$myfile = 'textfile.txt';
if (file_exists($myfile)) {
    echo "Файл $myfile существует";
} 
 
$myContent = $_POST['all'];
file_get_contents($myfile, utf8_encode($myContent)); 
 
$myfile2 = 'textfile2.txt';
$myContent2 = $_POST['success'];
file_get_contents($myfile2, utf8_encode($myContent2)); 
 
echo file_get_contents($myfile2);
?>
 
    <form action='http://content-available-to-author-only.do/index.php' method='post' >
    <fieldset>
     <input type="text" name='all' value="<?=$all;?>"><br>
    <input type="text" name='success' value="<?=$success;?>">
	<br>
	<button type="submit" class="btn">Результат</button>
    </fieldset>
    </form>
 
Проект
<div class="progress progress-info">
    <div class="bar" style="width: <?=$result;?>%"> <?=$success;?></div>
</div>

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